Adapter for a heat gun

ABSTRACT

The heat gun adapter for accelerated kindling and burning out of combustible solids, (K) especially charcoal, is formed by a shielding cover (1) which is open up to the combustible material (K) and stores and conducts heat to the combustible material (K). The shielding cover has a connecting sleeve (2) for a pipe connection piece (3) that attaches to the heat gun (4).

CROSS REFERENCE TO RELATED APPLICATION

The present application is the national stage under 35 U.S.C. 371 ofPCT/EP98/05397, filed Aug. 26, 1998.

FIELD OF THE INVENTION

The invention relates to a dome for a hot-air gun for acceleratedignition and burning of solid fuels, especially charcoal.

REVIEW OF RELATED ART

High-temperature air currents generated by hot-air guns can effectivelyperform various tasks. Specially-shaped shaped domes can furtherincrease the effectiveness of such currents through the purposefuldirection of the hot-air current. In the domes known and used to now,the hot air is used briefly, on a relatively small surface. Due to theabsence of a cover, the heat is quickly dispersed into the surroundingarea.

SUMMARY OF THE INVENTION

It is an object of the invention to provide a dome that has a simpledesign and is inexpensive to produce, and whose particular spatial andrelatively large-surface shielding effect permits a rapid ignition ofembers and a rapid burning of fuels.

This object is accomplished by a shield hood that is open toward thefuel, stores heat and conducts it toward the fuel, and has a connectingsleeve for a pipe socket for the connection to the hot-air gun.

It is a further object of the invention to attain a reduction in flyingsparks when the fire is ignited.

This object is accomplished in that the pipe socket has at least oneventilation opening inside the shield hood.

A further object of the dome is a more controlled fire ignition.

This object is accomplished in that a plurality of air-divertingopenings is cut into the shield hood, specifically in the jacket regionadjacent to the open end face of the pipe socket.

Advantageous modifications of the solutions to the objects ensue fromthe dependent claims.

The object of the invention encompasses not only the features of theindividual claims, but also combinations thereof.

The purposeful concentration of the heat in a limited space renders thecombustible material ready for use in less time.

The enrichment of hot air permits the ignition of the combustiblematerial without a further ignition source. No auxiliary agents (liquidor solid lighting aids) or methods of intensifying the glowing process(bellows or the like) are required for supporting the process.

The size of the hood is a function of the power of the hot-air gun andthe quantity of combustible material.

The shield hood according to the invention has a reflective insidesurface to avoid temperature gradients. This surface preferablycomprises high-grade steel to support the intended effect throughreflection.

For safe handling, the pipe socket preferably projects diagonally intothe hood from above, and to the outside such that the space between thehood surface and the connecting sleeve to the hot-air gun issufficiently large to avoid injuries. To apply the hot air directly tothe combustible material, the pipe socket is extended into the centerpart of the hood.

The hood is advantageously provided with openings to allow air to exit.These openings are preferably provided in the lower region to avoidflying sparks. A hemispheric hood design is advantageous.

This shield hood has a simple, inexpensive design, functions reliably,and adds service value to charcoal grills.

With the arrangement of at least one ventilation opening in the pipesocket at a short distance from the shield hood, less air exits at thelower end of the pipe socket when the charcoal ignites, and thus fewersparks fly.

The holes cut into the front edge of the shield hood, which are disposedpartly around the circumference and partly over the height of the shieldhood, disperse the hot air, thus effecting a more controlled ignition ofthe fire.

The combination of the ventilation opening in the pipe socket and theair-diverting openings in the globe-shaped shield hood, in combinationwith the advantages of the more controlled ignition and the reduction inflying sparks, lends the dome an increased service value.

BRIEF DESCRIPTION OF THE DRAWING FIGURES

Variations of an embodiment according to the invention are illustratedin the drawing, which shows in:

FIG. 1 a schematic cross-section through a shield hood associated with agrill bottom, having an inserted pipe socket for the connection of ahot-air gun and air openings cut into the hood;

FIG. 2 a cross-section through the shield hood with a ventilationopening cut into the pipe socket and rows of ventilation holes cut intothe hood; and

FIG. 3 a plan view, partly in section, of the shield hood with the pipesocket and holes according to FIG. 2.

DETAIL DESCRIPTION OF THE PREFERRED EMBODIMENTS

The hot-air gun dome for accelerated ignition and burning of solid fuels(K), especially charcoal, has a shield hood (1) that is open toward thefuel (K) and stores heat and conducts it to the fuel (K), with aconnecting sleeve (2) for a pipe socket (3) for the connection of thehot-air gun (4). The shield hood (1) comprises a heat-resistantmaterial, such as metal, with a reflective inside surface. The shieldhood (1) has a hemispheric or globe shape.

The pipe socket (3) terminates diagonally from above into the shieldhood (1).

The pipe socket (3) projects with a longitudinal region (L) into theinterior (1b) of the shield hood (1), and is chamfered at its open endface (end face/chamfer 3a). The metallic pipe socket (3) preferablycomprises copper; it can, however, also comprise high-grade steel orother suitable materials.

Air openings or holes (5), which are preferably arranged in a row, arecut into the circumference of the shield hood (1), with spacing from thehood opening (edge).

The cross section of the pipe socket (3) and the sum of the crosssections of the air opening (5) for the exit of air are that is, the airinflow area and the air outflow area nearly identical.

The pipe socket (3) is about 200 mm long, and projects diagonally,namely at a 30° angle, from above into the hemisphere (1), which is opentoward the bottom and has a diameter of about 160 mm.

The air openings (5) have a diameter of about 5 mm, and are uniformlyspaced in a circle.

Inside the shield hood (1), the pipe socket (3) has at least oneventilation opening (6).

The ventilation opening (6) is formed by a hole spaced from the shieldhood (1), and is cut into the pipe socket (3) at a shorter distance fromthe shield hood (1) than from the end face (3a) of the pipe socket (3)open toward the charcoal.

A plurality of air-diverting openings (5) is cut into the shield hood(1), namely in the jacket region (1a) adjacent to the open end face (3a)of the pipe socket (3). These air-diverting openings (or holes) (5) areformed by two rows of superposed, spaced holes distributed over abouthalf of the circumference of the shield hood (1); the two rows of holes,which have a specific spacing from one another, extend from a specific(small) distance from the hood edge open toward the bottom to one-halfof the height of the hood at the most.

The shield hood (1) is preferably used for grilling charcoal (K), whichlies in a grill bottom (7) and is covered to a great extent by thelower, open side of the hemispheric hood (1).

I claim:
 1. A dome adapted to accelerated ignition and burning of solidfuel with a hot-air gun (4), the dome comprising:a pipe socket (3) forconnection to the hot-air gun; a shield hood (1) including an interiorthat is adapted to open toward the fuel (K), and store and conduct heatto the fuel (K); the shield hood comprising a connecting sleeve (2)adapted to accept the pipe socket (3) for the connection to the hot-airgun (4); wherein the shield hood (1) includes a hemispheric shape with ahood opening; wherein the pipe socket (3) comprises a longitudinalregion (L) projecting into the interior (1b) of the shield hood (1);wherein the shield hood (1) includes air holes (5) that are distributedaround a circumference of the hood, and spaced from an edge of the hoodopening; and wherein the pipe socket (3) includes at least oneventilation opening (6) inside the shield hood (1).
 2. The domeaccording to claim 1, wherein the shield hood (1) comprises aheat-resistant material including a reflective inside surface.
 3. Thedome according to claim 2, wherein the heat-resistant material comprisesa metal.
 4. The dome according to claim 1, wherein the pipe socket (3)terminates diagonally from above into the shield hood (1).
 5. The domeaccording to claim 1, wherein the pipe socket (3) extends to a center ofthe shield hood (1) and is chamfered at an open end face (3a) thereof.6. The dome according to claim 1, wherein a cross section of the pipesocket (3) and a sum of area cross-sections of the air holes (5) for theexit of air are nearly identical.
 7. The dome according to claim 1,wherein the ventilation opening (6) is spaced from the shield hood (1).8. The dome according to claim 1, wherein the ventilation opening (6) isin the pipe socket (3) at a shorter distance from the shield hood (1)than from an end face (3a) of the pipe socket (3) that is open to thesolid fuel.
 9. The dome according to claim 1, wherein the air holes (5)include two superposed rows of the air-diverting holes spaced from thelower, open edge of the hood opening, over about half of a circumferenceof the shield hood (1) opening.
 10. The dome according to claim 1,wherein the solid fuel includes charcoal.
 11. The dome according toclaim 1, wherein the longitudinal region (L) does not project into anexterior of the shield hood, and wherein the connecting sleeve isadapted to accept the pipe socket from outside the dome.